入境隨俗 [ㄖㄨˋ ㄐㄧㄥˋ ㄙㄨㄟˊ ㄙㄨˊ; ru4 jing4 sui2 su2] When you enter a country, follow the local customs (idiom); do as the natives do When in Rome, do as the Romans do ◄ ►